Shore head bracket



"Oct. 6, 1931. c. M. MARKHAM I SHORE HEAD BRACKET Filed Oct. 14, 1929 gwumto'o mm m man/04M Patented Oct. 6, 1931 PATENT OFFICE CHARLES M. MARKHAM, OF TOLEDO, OHIO SHORE HEAD BRACKET Application filed October 14, 1929. I Serial No. 399,485.

14. The bar 10 adjacent the plate 14 is This invention relates to a shore head bracket devised with special reference to its use in securing the cross head at the upper end of a shore beam for supporting and securing a concrete form for a joist or girder.

The general object of the invention is to provide a practical and efficient device by means of which the cross head may be rigidly secured to the shore beam and strongly braced, and especially one which will effect a considerable saving in the amount expended for labor and material.

The invention will be more particularly described in connection with the accompanying drawings, in which Figure 1 is a side elevation of the bracket in operative position, a portion being broken away for better illustration of the construction.

Figure 2 is a section taken on the line 22 of Figure 1.

Figure 3 is a section taken on the line 3-3 of Figure 1.

As illustrated in the drawings, the invention is associated with the upper end of a shore beam 5 for the purpose of securing a cross head 6 thereto in position for supporting a concrete form 7 for laying a joist or girder. My improved bracket comprises a channel bar 8 which constitutes a seat or stirrup for the cross head 6 which may be rigidly secured to its seat by nailing through the holes 9. Opposed channel bars 10 are welded or otherwise secured to the bar 8 to extend downwardly therefrom their lower ends being connected by transverse strips 11 to form a casing which is adapted to receive the upper end of the beam 5 while the channel bar 8 rests thereon. Suitable braces 12, preferably in the form of channel bars, extend from the lower ends of the bars 10 to the outer ends of the bar 8. Thus a strong and well braced bracket is provided, which may be quickly dropped over the end of the beam 5 and the cross head 6 secured thereto.-

In order that the bracket may be rigidly but removablv secured to the upper end of the beam 5, it is preferred to leave a space between one of the channel bars 10 and the face of the beam, sufficient to receive a plate formed with inwardly inclined portions 13 which are engageable by similar inclined portions 15 of the plate 14. As the plate 14 is driven downwardly, therefore, the opposed inclined faces 13 and 15 exert a wedge action to force the'plate 14 against the face of the beam to clamp the bracket securely thereto. The plate 14 is guided for longituclinal slidable movement by pins 16 which 7' extend through vertical slots 17 formed in the adjacent bar 10. The plate 14 projects downwardly beyond the lower end of the bracket and is formed with a head 18 which is adapt- A ed to receive blows of a hammer toy drive the plate into clamping relation to the beam or to release the same therefrom. After the plate 14 has been driven into clamping relation to the beam, it may be secured by a nail driven through the hole 19.

From the foregoing description, it will be seen that I have provided a bracket which is practical in its construction, which may be manufactured at a moderate cost, and which may be used to clamp the cross head to the shore beam with the least possible expenditure for labor or material. The cost of the brackets and of the material used for shoring is comparatively low, since they may be used over and over again.

While I have shown and described specifically one form of the invention, it will be understood that the same may be considerably modified, and is also capable of other uses within the scope of the appended claims.

What I claim is:

1. A bracket comprising a casing adapted to receive the end of a beam. a transverse member rigidly secured to said casing and u adapted to receive a cross head, said casing having an interior longitudinally inclined surface, and a plate provided with wedging means cooperating with said inclined surface to clamp the casing to the beam.

2. A bracket comprising a casing adapted to receive the end of a beam. a transverse member rigidly secured to said casing and adapted to receive a cross head, and a plate inside the casing having a pin and slot connection therewith, said plate and the wall of Y the casing having coengaging inclined surfaces to Wedge the plate against the beam and clamp the bracket thereto.

3. A bracket comprising a casing adapted to receive the end of a beam, a transverse member rigidly secured to said casing and adapted-toreceive a cross head, a plate guided for limited sliding movement longitudinally of the casing, Wedging means actuating the plate to clamp the casing to the beam when the plate is so moved and a head outside the casing and connected to the plate foractuating the Wedging means.

4. A bracket comprising a casing adapted to receive the end of a beami a transverse mem'ber rigidly secured to said casing and adaptedito receive a cross head, a plate havinga rflat surface inside the casing opposed to oneside thereof and of approximatelythe smemrea'as one side of the casing, said plate heing shiftable to clamp the casing to the beam, and a head outside the casing and intag-rally connected to said plate for transforceto the latterto shift it to clampingzposition.

5. A bracket comprising a casing adapted to raeeive the end of a beam. a transverse member rigidly secured to said casing and adapted to receive a cross head, said casing rlnzvmg an interior longitudinally inclined nnlfince, asplateinside the casing and having :11 .portion cooperating with said inclined surface to clamp the casing to the lheamyandahead outside the casing and integrally connected to said plate for trans- :mittingforceto thelatter to shift it to clamping positiun.

In wtestimony whereof I have hereunto :signed my name to this specification.

CHARLES M. MARKHAM. 

